Question

The number of oxygen atoms present in 50g of calcium carbonate is

Answer 1

molar mass of caco3 is 100 amu and given is 50g therefore moles present is 0.5 moles . caco3 has 3 oxygen atom therefore no. of moles of oxygen is 3×0.5 = 1.5moles. number of atoms should be 1.5Na